參數(shù)資料
型號(hào): BT849A
英文描述: Single-Chip Video Capture for PCI
中文描述: 單芯片的PCI視頻捕捉
文件頁(yè)數(shù): 78/141頁(yè)
文件大?。?/td> 1149K
代理商: BT849A
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)當(dāng)前第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)
Bt848/848A/849A
Single-Chip Video Capture for PCI
Brooktree
68
E
LECTRICAL
I
NTERFACES
General Purpose I/O Port
L848A_A
General Purpose I/O Port
The Bt848 provides a 24-bit wide general purpose I/O port. There are two modes
of operation for the GPIO port: normal mode and synchronous pixel interface
(SPI) mode. In the normal mode, the GPIO port is used as a general purpose port
enabling 24-bits of data to be input or output (Figure 29). In the SPI input mode,
the GPIO port can be used to input the video data from an external video decoder
and bypass the Bt848’s video decoder block (Figure 30). In the SPI output mode,
the output of the Bt848’s video decoder can be passed over the GPIO bus
(Figure 31), while being utilized by the rest of the Bt848 circuitry.
In addition to the 24 I/O bits, the GPIO port includes an interrupt pin, and a
write enable pin. The GPINTR signal sets the bit in the interrupt register and caus-
es an interrupt condition to occur. The GPWE signal enables sampling of the data
on the GPIO port and places the data in an internal GPIO register. The polarity of
the GPWE pin is programmable.
The SPI output mode is automatically enabled if GPWE is sampled high and
GPINTR is sampled low upon release of the RST pin. This overrides the GPIO-
MOD bits in the GPIO/DMA control register and can only be returned to register
control by assertion of the RST pin while GPWE and GPINTR are in any other
states than high and low respectively. Care must be taken to ensure the state of
GPWE and GPINTR are configured correctly for the desired use of the GPIO pins.
Internal pullups are provided on both pins.
Figure 29. GPIO Normal Mode
Video
Decoder
Scaler
Video Data
Format Converter
FIFO
DMA Controller
and PCI Initiator
Local Registers
External
Circuitry
GPIO Port
24 Bits of General I/O
Figure 30. GPIO SPI Input Mode
Video
Decoder
Scaler
Video Data
Format Converter
FIFO
DMA Controller
and PCI Initiator
Local Registers
External
Video Decoder
GPIO Port
相關(guān)PDF資料
PDF描述
BT8510EPJC PCM Transceiver
BT857KPJ Color Encoder Circuit
BT8958EHJ50 xDSL Interface
BT8953AEPFC xDSL Interface
BT8953AEPJ xDSL Interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BT849AKPF 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Single-Chip Video Capture for PCI
BT850-SA 功能描述:BTV4.2 DUAL MODE USB HCI MODULE 制造商:laird - wireless & thermal systems 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1
BT850-SA-T/R 功能描述:BTV4.2 DUAL MODE USB HCI MODULE 制造商:laird - wireless & thermal systems 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:2,500
BT850-ST 功能描述:BTV4.2 DUAL MODE USB HCI MODULE 制造商:laird - wireless & thermal systems 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1
BT850-ST-T/R 功能描述:BTV4.2 DUAL MODE USB HCI MODULEE 制造商:laird - wireless & thermal systems 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:2,500